CN104628444B - A kind of method that mutual solution slip produces nitrogen potash fertilizer - Google Patents
A kind of method that mutual solution slip produces nitrogen potash fertilizer Download PDFInfo
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Abstract
The present invention relates to a kind of method that mutual solution slip produces nitrogen potash fertilizer, comprise the following steps：(1) appropriate system cleaning solution is added after mixing urea or nitrate, sylvite (potassium sulfate or potassium chloride), ammonium sulfate, by steam indirectly heat to 90~100 DEG C, mutual solution slip I is made；(2) a certain amount of bed material (circular flow reaches 2~3 times of input drum granulating device mutual solution slip flow), is put into by composition of raw materials in comminutor, and preheats bed material temperature and reaches 50~60 DEG C；(3) mutual solution slip I obtained by step (1) is sent into the shotcrete pipe of comminutor, in step (2) comminutor equipped with bed material, is sprayed on returning charge bed and granulates through shower nozzle, form the semi-product material II of water content 2~4%；(4) semi-product material II obtained by step (3) is obtained into the circular granule nitrogen and potassium fertilizer product that particle diameter is 2~4.75mm through processes such as drying, screening, coolings.The granule strength of the nitrogen potash fertilizer of the method production of the present invention is high, and steam and fuels and energy consumption are relatively low, the method that the larger mutual solution slip of same size device capbility produces nitrogen potash fertilizer.
Description
Technical field
The present invention relates to a kind of method that mutual solution slip produces nitrogen potash fertilizer, using urea (or nitrate) and ammonium sulfate (or
Ammonium sulfate+potassium sulfate, or ammonium sulfate+potassium chloride) co-dissolve (can use process units system in a certain amount of water in actual production
Cleaning solution in system), a kind of mutual solution slip of good fluidity is formed, production nitrogen potash fertilizer in comminutor is then sprayed at, belongs to
Fertilizer field.
Background technology
The technique of production nitrogen potash fertilizer mainly has both at home and abroad at present：" Chemical Mixed Fertilizer " based on nitrogenous, solid fertilizer containing potassium
Technique, it can be raw material with urea, ammonium nitrate, ammonium chloride, ammonium sulfate, potassium chloride (or potassium sulfate) etc., size-reduced to certain thin
After degree, material carries out agglomeration granulation in the rolling bed of rotary drum granulator (or granulating disc) by humidification, heating.Granules
Material obtains nitrogen potash fertilizer products through drying, screening, cooling.But this technique comes with some shortcomings and weakness, mainly grinding consumes
Can high, granulation water height need to consume more steam and the granule strength of fuels and energy, particularly product is relatively low, frangible easy caking
The problems such as.
To overcome the shortcoming of above-mentioned nitrogen potash fertilizer production technology, people have also researched and developed some improved technologies, for example with
Urea melting liquid substitutes " urea melting " technique of water and steam granulation, but the more difficult control of this technical operation, is also easy to produce to planting
The problems such as biuret that thing is harmful to.And for example：Using the technique of " reaction slurry of sulfuric acid and ammonia " technique productions nitrogen potash fertilizer, although energy
Consumption is better than " Chemical Mixed Fertilizer " technique with product quality, but also still has several drawbacks, one be when sulfuric acid and synthesize the consumption of ammonia compared with
When many, then the nutrient of product is limited by larger；Two be the slurry for granulation when the consumption of sulfuric acid and synthesis ammonia is less
Amount is not enough, and granulation is difficult, and production capacity is relatively low, when the consumption of sulfuric acid and synthesis ammonia it is low to a certain extent when, the production technology also just becomes
It is bordering on " Chemical Mixed Fertilizer " technique.
In the production technology of N P and K (NPK) composite fertilizer, although had a kind of " mutual solution slip tubular reactor system
The patent of invention (number of patent application is 200810223506.3) of the method for making composite fertilizer ", but if using the method for the technology
Produce nitrogen potassium (NK) fertilizer：One is not contain P in product2O5, it is necessary to solve how to prepare the common molten material for being suitable for nitrogen potash fertilizer granulating
The problem of slurry；Two be in tubular reactor, due to the further reaction of no MAP (MAP) and synthesis ammonia, sulfuric acid etc.
Can be again very limited with the raw material quantity of ammonia synthesis reaction, tubular reactor is because of reactant wretched insufficiency, it is impossible to form a level pressure
Under conditions of power, the slurry sprinkling for being suitable for the granulation of nitrogen potash fertilizer how is realized, is also the technical barrier that must be solved.
Therefore it provides a kind of product particle intensity is high, steam and fuels and energy consumption are relatively low, same size device capbility compared with
The method that big mutual solution slip produces nitrogen potash fertilizer, just turns into the technical barrier that the technical field is badly in need of solving.
The content of the invention
The purpose of the present invention is for productions such as current " Chemical Mixed Fertilizer ", " urea melting ", " sulfuric acid and ammonia reaction slurries "
The shortcoming and defect of nitrogen potash fertilizer technique, nitrogen can not be produced by solving " a kind of method of preparing complex fertilizer with mutual solution slip tubular reactor "
The defect of potash fertilizer is high there is provided a kind of product particle intensity, and steam and fuels and energy consumption are relatively low, and same size device capbility is larger
Mutual solution slip produce nitrogen potash fertilizer method.
The above-mentioned purpose of the present invention reaches by the following technical programs：
A kind of method that mutual solution slip produces nitrogen potash fertilizer, comprises the following steps：
(1) a certain amount of water is added in common fluid bowl (according to the water content requirement and required addition for preparing mutual solution slip
Solid material amount, which is calculated, to be determined, during normal production for internal system cleaning solution, mutual solution slip reclaimed water of its consumption to be prepared
Content reaches that 10~15 weight % are defined), and agitating paddle is started, it is passed through and is steam heated to 90 DEG C~100 DEG C, at the top of common fluid bowl
Different feed openings, weight (butt, similarly hereinafter) are accounted for the urea or nitrate of raw material gross weight 20.0~30.0%, raw material gross weight
0.00~15.00% sylvite (potassium sulfate or potassium chloride), the ammonium sulfate of raw material gross weight 5~20% adds fluid bowl altogether, stirred
Mix under state, mutual solution slip I is made；
(2) bed material is put into comminutor, bed material is put into by the proportion requirement of composition of raw materials, and bed material is in comminutor unit
Between internal circulating load reach input comminutor unit interval mutual solution slip I 2~3 times of weight, start the granulation returning charge circulatory system, and
Bed material temperature is preheated to system progress and reaches 50~60 DEG C；
(3) shurry pump is started, mutual solution slip I obtained by step (1) is sent into the shotcrete pipe of comminutor by shurry pump, is formed
The mutual solution slip I of certain pressure is sprayed on returning charge bed in step (2) comminutor equipped with bed material through multiple shower nozzles,
Other raw materials in addition to the raw material for being used to be made needed for mutual solution slip I described in step (1) are added described in step (2) simultaneously
In comminutor equipped with bed material；Solid material in comminutor passes through with the rotation of cylinder when slurry uniformly sprays
Coating and cementation, form the weight % of water content 2~4 semi-product material II in continuous roll；
(4) by the semi-product material II obtained by step (3) through drying, screening, refrigerating work procedure, obtain particle diameter for 2mm~
4.75mm circular granule nitrogen and potassium fertilizer product.
A kind of optimal technical scheme, it is characterised in that：Composition of raw materials described in the step (2) is according to production nitrogen potash fertilizer
Different size kind is determined.
A kind of optimal technical scheme, it is characterised in that：Drying passes through the temperature from combustion furnace described in the step poly- (4)
Completed for 80~150 DEG C of hot gas, the temperature of product is 60~70 DEG C after drying.
A kind of optimal technical scheme, it is characterised in that：The hole of levels screen cloth used is sieved described in the step poly- (4)
Footpath is respectively 4.75mm and 2.00mm.
A kind of optimal technical scheme, it is characterised in that：The temperature of product is 40~50 after being cooled down described in the step poly- (4)
℃。
Beneficial effect：
The nitrogen potash fertilizer that is produced of the present invention, according to plant and soil fertility situation, required for both can easily having added plant
It is various in, micronutrient point element, the need for meeting various plant special fertilizers.
The method that the mutual solution slip of the present invention produces nitrogen potash fertilizer, with following outstanding advantages：
(1) compared with existing " sulfuric acid is with ammonia reaction slurry " technique, one be same apparatus production capacity it is higher.Because can be with
Realize and change into fraction solids raw materials for production as the binding agent granulated after liquid slurry, by regulating and controlling suitable liquid-solid ratio,
Under conditions of good granulation is ensured, the water into device can be less, thus production capacity can be higher.
(2) compared with existing " sulfuric acid is with ammonia reaction slurry " technique, nitrogen potash fertilizer is produced with the mutual solution slip of the present invention
The granule strength of the product of method manufacture is higher, i.e., the physical property of product is more preferably, more difficult frangible, easy efflorescence, easily occur
The problems such as caking.(or more liquid slurry) is passed through than solid material and increased by the granulating based on coating because liquid slurry
Wet heating, particle surface dissolve on a small quantity it is adhered to one another based on granulating, the granule strength of product is higher.
(3) with " urea melting " technics comparing, the more difficult control of " urea melting " technological operation can be fundamentally solved, easily production
The raw biuret problem to plant pest.Because the present invention mutual solution slip production nitrogen potash fertilizer method technique slurry temperature compared with
Low (90~100 DEG C), will not generate biuret in this temperature range；The urine temperature of " urea melting " technique it is higher (120~
130 DEG C), it is easy to generate biuret.
(4) with " sulfuric acid and ammonia reaction slurry " technics comparing, the method for mutual solution slip production nitrogen potash fertilizer of the invention is manufactured
The total nutrient of product can be higher.The nitrogen potash fertilizer production of identical yield and suitable product particle intensity is produced to identical device
For product, " reaction slurry of sulfuric acid and ammonia " needed for granulation can be with by urea (or nitrate) and ammonium sulfate (or ammonium sulfate
+ potassium sulfate, or ammonium sulfate+potassium chloride) " mutual solution slip " that is made substitute, and because the reaction slurry of sulfuric acid and ammonia it is effective
Nutrient nitrogen quantity is 21% or so, and by urea (or nitrate) and ammonium sulfate (or ammonium sulfate+potassium sulfate, or ammonium sulfate+chlorination
Potassium) total nutrient of " mutual solution slip " that is made can reach 40~50%.
(5) mutual solution slip of the invention produces the method technique of nitrogen potash fertilizer, and nitrogen is produced available for " Chemical Mixed Fertilizer " process units
The technological transformation of potash fertilizer, can improve the technical merit of " Chemical Mixed Fertilizer " device, promote the technological progress of industry, produce huge society
Can benefit.
Below by embodiment, the present invention will be further described, but is not meant to the scope of the present invention
Limitation.
Embodiment
Embodiment 1
" 20-0-25 " urinates the production of base-chloro NK fertilizer, and composition of raw materials is：Urea 351.99kg/t (46N%)；Sulfuric acid
Ammonium：(181.34kg/t 21N%)；Potassium chloride：(416.67kg/t 60%KCL)；Bentonite：50.00kg/t.Production stage is such as
Under：
(1) a certain amount of water is added in common fluid bowl (according to the water content requirement and required addition for preparing mutual solution slip
Solid material amount, which is calculated, to be determined, during normal production for internal system cleaning solution), and start agitating paddle, be passed through and be steam heated to
90 DEG C, the different feed openings at the top of common fluid bowl, according to the formula of " 20-0-25 ", while being separately added into urea 211.19kg/t, chlorine
Change potassium 83.33kg/t, ammonium sulfate 181.34kg/t；Produce the mutual solution slip (temperature of qualified " urea+potassium chloride+ammonium sulfate "
90~100 DEG C；Water content 10~15%).
(2) a certain amount of bed material is put into comminutor, the internal circulating load of bed material reaches that mutual solution slip puts into comminutor instantaneous flow
2~3 times (refer to that internal circulating load of the bed material in the comminutor unit interval reaches input comminutor unit interval mutual solution slip amount
2~3 times), bed material is put into by the proportion requirement of composition of raw materials, starts the granulation returning charge circulatory system, and system is preheated to
Bed material temperature reaches 50~60 DEG C.
(3) shurry pump is started, mutual solution slip obtained by step (1) is sent into the shotcrete pipe of comminutor, mutual solution slip is through shower nozzle
It is sprayed on the returning charge bed in comminutor, while urea, the 333.34kg/ of the revert system addition 140.80kg/t in comminutor
T potassium chloride, 50.00kg/t bentonite.Solid material in comminutor uniformly sprays with the rotation of cylinder in slurry
When by coating and cementation, the weight % of water content 2~4 semi-product material is formed in continuous roll.
(4) semi-product material obtained by step (3) through drying (hot air temperature of the drying machine from combustion furnace is 80~150 DEG C,
After drying the temperature of product be 60~70 DEG C, residence time of the material in drying machine be 30~50 minutes), screening (levels
The aperture of screen cloth is respectively 4.75 and 2.00mm), cooling (after product cooling be 40~50 DEG C, stop of the product in cooler
Time is 20~30 minutes), that is, obtain the nitrogen potash fertilizer products that particle diameter is 2~4.75mm.
By this composition of raw materials produce product specification be：K2O%=20.00；N%=20.00；H2O%=1.0~1.5；
Granularity (2~4.75mm%) >=90；Granule strength=15~20N.
Embodiment 2
The production of " 15-0-25 " nitro-sulfur-based (chloride content≤2.5%) NK fertilizer, composition of raw materials is：Ammonium nitrate：
(333.22 N%34.0)；Potassium sulfate：451.89kg/t(K2O%50)；Potassium chloride：(40.09kg/t 60%KCL)；Ammonium sulfate：
(174.8kg/t N%21).Production stage is as follows：
(1) a certain amount of water is added in common fluid bowl (according to the water content requirement and required addition for preparing mutual solution slip
Solid material amount, which is calculated, to be determined, during normal production for internal system cleaning solution), and start agitating paddle, be passed through and be steam heated to
90℃；Different feed openings at the top of common fluid bowl, according to the formula of " 15-0-25 ", while be separately added into ammonium nitrate 233.26kg/t,
Ammonium sulfate 174.8kg/t；Mutual solution slip (90~100 DEG C of the temperature of qualified ammonium nitrate and ammonium sulfate is made；Water content 10~
15%).
(2) in a certain amount of bed material of comminutor input, (internal circulating load of bed material reaches that mutual solution slip input prilling granulator is instantaneous
2~3 times of amount, bed material is put into by the proportion requirement of composition of raw materials, starts the granulation returning charge circulatory system, and system is preheated
50~60 DEG C are reached to bed material temperature.
(3) shurry pump is started, mutual solution slip obtained by step (1) is sent into comminutor shotcrete pipe, being total to for certain pressure is formed
On the returning charge bed that molten slurry is sprayed in comminutor through shower nozzle, while the revert system in comminutor adds 451.89kg/t sulphur
Solid material in the ammonium nitrate of sour potassium, 40.09kg/t potassium chloride and 333.22-233.26=99.96kg/t, comminutor with
The rotation of cylinder, when slurry uniformly sprays by coating and cementation, water content 2~4 is formed in continuous roll
Weight % semi-product material.
(4) semi-product material obtained by step (3) through drying (hot air temperature of the drying machine from combustion furnace is 80~150 DEG C,
After drying the temperature of product be 80~90 DEG C, residence time of the material in drying machine be 30~50 minutes), screening (levels
The aperture of screen cloth is respectively 4.00 and 2.00mm), cooling (after product cooling be 40~50 DEG C, stop of the product in cooler
Time is 20~30 minutes), that is, obtain the compound fertilizer product that particle diameter is 2~4.75mm.
The product specification produced by this composition of raw materials is (15-0-25)：K2O%=25.00；N%=15.00；H2O%
=1.0~1.5；Granularity (2~4.75mm%) >=90；Granule strength=15~20N.
The nitrogen potash fertilizer that is produced of the present invention, according to plant and soil fertility situation, it is convenient to required for adding plant
In various, micronutrient point element, the need for meeting various plant special fertilizers.
The method of the mutual solution slip production nitrogen potash fertilizer of the present invention has following outstanding advantages：
(1) compared with existing " sulfuric acid is with ammonia reaction slurry " technique, one be same apparatus production capacity it is higher.Because can be with
Realize and change into fraction solids raw materials for production as the binding agent granulated after liquid slurry, by regulating and controlling suitable liquid-solid ratio,
Under conditions of good granulation is ensured, the water into device can be less, thus production capacity can be higher.
(2) compared with existing " sulfuric acid is with ammonia reaction slurry " technique, nitrogen potash fertilizer is produced with the mutual solution slip of the present invention
The granule strength of the product of method manufacture is higher, i.e., the physical property of product is more preferably, more difficult frangible, easy efflorescence, easily occur
The problems such as caking.(or more liquid slurry) is passed through than solid material and increased by the granulating based on coating because liquid slurry
Wet heating, particle surface dissolve on a small quantity it is adhered to one another based on granulating, the granule strength of product is higher.
(3) with " urea melting " technics comparing, the more difficult control of " urea melting " technological operation can be fundamentally solved, easily production
The raw biuret problem to plant pest.Because the present invention mutual solution slip production nitrogen potash fertilizer method technique slurry temperature compared with
Low (90~100 DEG C), will not generate biuret in this temperature range；The urine temperature of " urea melting " technique it is higher (120~
130 DEG C), it is easy to generate biuret.
(4) with " sulfuric acid and ammonia reaction slurry " technics comparing, the method for mutual solution slip production nitrogen potash fertilizer of the invention is manufactured
The total nutrient of product can be higher.The nitrogen potash fertilizer production of identical yield and suitable product particle intensity is produced to identical device
For product, " reaction slurry of sulfuric acid and ammonia " needed for granulation can be with by urea (or nitrate) and ammonium sulfate (or ammonium sulfate
+ potassium sulfate, or ammonium sulfate+potassium chloride) " mutual solution slip " that is made substitute, and because the reaction slurry of sulfuric acid and ammonia it is effective
Nutrient nitrogen quantity is 21% or so, and by urea (or nitrate) and ammonium sulfate (or ammonium sulfate+potassium sulfate, or ammonium sulfate+chlorination
Potassium) total nutrient of " mutual solution slip " that is made can reach 40~50%.
(5) mutual solution slip of the invention produces the method technique of nitrogen potash fertilizer, and nitrogen is produced available for " Chemical Mixed Fertilizer " process units
The technological transformation of potash fertilizer, can improve the technical merit of " Chemical Mixed Fertilizer " device, promote the technological progress of industry, produce huge society
Can benefit.
Claims (5)
1. a kind of method that mutual solution slip produces nitrogen potash fertilizer, comprises the following steps：
(1) add water in common fluid bowl, its addition using water content in the mutual solution slip prepared reach 10~15 weight % as
Standard, and agitating paddle is started, it is passed through and is steam heated to 90 DEG C~100 DEG C, different feed openings, raw material is accounted for by weight at the top of common fluid bowl
The urea or nitrate of gross weight 20.0~30.0%, the sylvite of raw material gross weight 0.00~15.00%, raw material gross weight 5~
20% ammonium sulfate, adds fluid bowl altogether, under stirring, mutual solution slip I is made；
(2) bed material, is put into comminutor, bed material is put into by the proportion requirement of composition of raw materials, and bed material is in the comminutor unit interval
Internal circulating load reach input comminutor unit interval mutual solution slip I 2~3 times of weight, start the granulation returning charge circulatory system, and right
System progress is preheated to bed material temperature and reaches 50~60 DEG C；
(3) mutual solution slip I obtained by step (1), is sent into the shotcrete pipe of comminutor by shurry pump, the slurry of certain pressure is formed
In step (2) comminutor equipped with bed material, it is sprayed on returning charge bed, is used while will remove described in step (1) through shower nozzle
Added in other raw materials beyond the raw material being made needed for mutual solution slip I in step (2) comminutor equipped with bed material；Making
Solid material in grain machine, when slurry uniformly sprays by coating and cementation, is constantly being rolled with the rotation of cylinder
The weight % of water content 2~4 semi-product material II is formed in dynamic；
(4) semi-product material II obtained by step (3), is obtained into the circle that particle diameter is 2mm~4.75mm through drying, screening, cooling
Shape granule nitrogen and potassium fertilizer product.
2. the method that mutual solution slip according to claim 1 produces nitrogen potash fertilizer, it is characterised in that：Institute in the step (2)
Composition of raw materials is stated to be determined according to the different size kind of production nitrogen potash fertilizer.
3. the method that mutual solution slip according to claim 1 produces nitrogen potash fertilizer, it is characterised in that：Institute in the step poly- (4)
State to dry and completed by the temperature from combustion furnace for 80~150 DEG C of hot gas, the temperature of product is 60~70 DEG C after drying.
4. the method that mutual solution slip according to claim 1 produces nitrogen potash fertilizer, it is characterised in that：Institute in the step poly- (4)
The aperture for stating the levels screen cloth used in screening is respectively 4.75mm and 2.00mm.
5. the method that mutual solution slip according to claim 1 produces nitrogen potash fertilizer, it is characterised in that：Institute in the step poly- (4)
The temperature for stating product after cooling is 40~50 DEG C.
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| CN101367682B (en) * | 2008-09-28 | 2011-06-15 | 中国海洋石油总公司 | Method for preparing complex fertilizer with mutual solution slip tubular reactor |
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